CVE-2025-61950CWE-639

CVE-2025-61950

Medium · published December 12, 2025

CVSS v3.0

4.3

EPSS

Percentile

8.1

In the wild

Unconfirmed

What it is

In GroupSession, a Circular notice can be created with its memo field non-editable, but the authorization check is improperly implemented. With some crafted request, a logged-in user may alter the memo field. The affected products and versions are GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and GroupSession ZION prior to ver5.3.2.

The record

Technical detail

CVSS v3.0: 4.3 · MEDIUM
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0: Not supplied
EPSS: 0.00189 · 8.1th percentile
Weakness: CWE-639 · Authorization Bypass Through User-Controlled Key
Published: 2025-12-12T10:16Z

Affected products (3)

Product	Versions	Fixed in
groupsession/groupsession	< 5.3.0	5.3.0
groupsession/groupsession	< 5.3.2	5.3.2
groupsession/groupsession	< 5.3.3	5.3.3

References (2)

https://groupsession.jp/info/info-news/security20251208 · [email protected]https://jvn.jp/en/jp/JVN19940619/ · [email protected]

EPSS history

Timeline

12 DEC 05:02Z
In GroupSession, a Circular notice can be created with its memo field non-editable, but the authorization check is improperly implemented
cvelistv5